• Reaction Rate Analysis of Manganese Ore Prereduction in CO-CO2 Atmosphere 

      Larssen, Trine Asklund; Senk, Dieter Georg; Tangstad, Merete (Peer reviewed; Journal article, 2021)
    • Reactive instabilities in linear acidizing on carbonates 

      Papamichos, Euripides; Strongylis, Polyneikis; Bauer, Andreas (Peer reviewed; Journal article, 2020)
      Acid injection, reactive instabilities and wormholing in carbonate reservoirs is investigated through the analysis of the linear acidizing problem theoretically and experimentally. Theoretically acidizing was analyzed by ...
    • Reactivity of CaO with CO2 in molten CaF2–NaF: formation and decomposition of carbonates 

      Tomkute, Viktorija; Solheim, Asbjørn; Sakirzanovas, Simas; Olsen, Espen (Journal article; Peer reviewed, 2016)
    • Reactivity of coke in relation to sulfur level and microstructure 

      Jahrsengene, Gøril; Rørvik, Stein; Ratvik, Arne Petter; Lossius, Lorentz Petter; Haverkamp, Richard G.; Svensson, Ann Mari (The Minerals, Metals & Materials Series;2367-1181, Peer reviewed; Journal article, 2019)
      Shrinkage induced flow, thermo-solutal convection and equiaxed grain motion are the major transport mechanisms contributing to macrosegregation formation in aluminum alloys produced through Direct Chill casting. Experimental ...
    • Real Time 3D Observations of Portland Cement Carbonation at CO2 Storage Conditions 

      Chavez Panduro, Elvia Anabela; Cordonnier, Benoit; Gawel, Kamila; Børve, Ingrid; Iyer, Jaisree; Carroll, Susan; Michels, Leander; Rogowska, Melania; McBeck, Jessica Ann; Sørensen, Henning; Walsh, Stuart; Renard, Francois; Gibaud, Alain; Torsæter, Malin; Breiby, Dag Werner (Peer reviewed; Journal article, 2020)
      Depleted oil reservoirs are considered a viable solution to the global challenge of CO2 storage. A key concern is whether the wells can be suitably sealed with cement to hinder the escape of CO2. Under reservoir conditions, ...
    • Real time 3D observations of Portland Cement Carbonation at CO2 storage conditions 

      Chavez Panduro, Elvia Anabela; Cordonnier, Benoit; Gawel, Kamila; Børve, Ingrid; Iyer, Jaisree; Carroll, Susan; Michels, Leander; Rogowska, Melania; McBeck, Jessica Ann; Sørensen, Henning; Walsh, Stuart; Renard, Francois; Gibaud, Alain; Torsæter, Malin; Breiby, Dag Werner (Peer reviewed; Journal article, 2020)
      Depleted oil reservoirs are considered a viable solution to the global challenge of CO2 storage. A key concern is whether the wells can be suitably sealed with cement to hinder the escape of CO2. Under reservoir conditions, ...
    • Real-Time Measurements and Characterization of Airborne Particulate matter from a Primary Silicon Carbide Productin Plant 

      Jørgensen, Rikke Bramming; Kero, Ida (Peer reviewed; Journal article, 2017)
      Airborne particulate matter in the silicon carbide (SiC) industry is a known health hazard. The aims of this study were to elucidate whether the particulate matter generated inside the Acheson furnace during active operation ...
    • Recent developments on manufacturing and characterization of fused quartz crucibles for monocrystalline silicon for photovoltaic applications 

      Warden, Gabriela Kazimiera; Juel, Mari; Gawel, Bartlomiej Adam; Sabatino, Marisa Di (Peer reviewed; Journal article, 2022)
      The dominating technology of solar cell production today is based on monocrystalline silicon, produced mostly by the Czochralski process. Recently, the solar cell industry, has started to move towards growing larger and ...
    • Rechargeable Batteries of the Future—The State of the Art from a BATTERY 2030+ Perspective 

      Clark, Simon; Fichtner, Maximilian; Edström, Kristina; Ayerbe, Elixabete; Berecibar, Maitane; Bhowmik, Arghya; Castelli, Ivano E.; Dominko, Roberto; Erakca, Merve; Franco, Alejandro A.; Grimaud, Alexis; Horstmann, Birger; Latz, Arnulf; Lorrmann, Henning; Meeus, Marcel; Narayan, Rekha; Pammer, Frank; Ruhland, Janna; Stein, Helge; Vegge, Tejs; Weil, Marcel (Peer reviewed; Journal article, 2021)
      The development of new batteries has historically been achieved through discovery and development cycles based on the intuition of the researcher, followed by experimental trial and error—often helped along by serendipitous ...
    • Recombination activity of grain boundaries in high-performance multicrystalline Si during solar cell processing 

      Krzysztof, Adamczyk; Søndenå, Rune; Stokkan, Gaute; Looney, Erin; Jensen, Mallory; Lai, Barry; Rinio, Markus; Sabatino, Marisa Di (Journal article; Peer reviewed, 2018)
      In this work, we applied internal quantum efficiency mapping to study the recombination activity of grain boundaries in High Performance Multicrystalline Silicon under different processing conditions. Wafers were divided ...
    • Recovery of Iron and Aluminum from Bauxite Residue by Carbothermic Reduction and Slag Leaching 

      Ekstrøm, Kai Erik; Bugten, Andreas Voll; Eijk, Casper van der; Lazou, Adamantia; Balomenos, E.; Tranell, Gabriella (Peer reviewed; Journal article, 2021)
      The recovery of major components of bauxite residue by carbothermic reduction at 1550–1750 °C and subsequent slag leaching in a Na3CO3(aq) solution is studied. Iron recovers primarily to pig-iron and lime is added to tune ...
    • Recovery of Platinum Group Metals From Secondary Sources by Selective Chlorination from Molten Salt Media 

      Martinez, Ana Maria Cuellar; Osen, Karen Sende; Støre, Anne (The Minerals, Metals & Materials Series;2367-1181, Peer reviewed; Journal article, 2020)
      The use of molten salts as “solvents” offers interesting possibilities for the treatment of ores, industrial by-products as well as scraps, allowing the development of processes that are mid-way between pyro- and ...
    • Recycled Aluminium Alloys and their Models: Role and Behaviour of Alloying Elements during Alkaline Etching 

      Mysliu, Erlind; Sletteberg Storli, Kathrine; Kjørsvik, Eline; Lunder, Otto; Erbe, Andreas (Peer reviewed; Journal article, 2023)
      Alkaline etching is a common pretreatment for aluminum surfaces. Etching behavior was compared between an alloy based on post-consumer scrap (PCS) and several model alloys of rolled AA3005 and extruded AA6060 with ...
    • Recycling of the Flue Gas from Aluminium Electrolysis Cells 

      Solheim, Asbjørn; Senanu, Samuel (The Minerals, Metals & Materials Series;2367-1181, Chapter; Peer reviewed, 2020)
      Recycling of the flue gas from aluminium reduction cells is a possible method for increasing the CO2 concentration, thereby enabling CO2 capture. The present paper represents a preliminary study concerning some of the ...
    • Recycling of the Rare Earth Oxides from Spent Rechargeable Batteries Using Waste Metallurgical Slags 

      Tang, Kai; Ciftja, Arjan; Eijk, Casper van der; Wilson, Shawn C.; Tranell, Gabriella (Journal article; Peer reviewed, 2013)
      A high temperature process for recycling spent nickel-metal hydride rechargeable batteries has been recently developed at SINTEF/NTNU. The spent battery modules were first frozen with liquid nitrogen for the de-activation ...
    • Redox transformations of Ru catalyst during NO oxidation at industrial nitric acid production conditions 

      Gopakumar, Jithin; Martin Benum, Pål; Svenum, Ingeborg-Helene; Enger, Bjørn Christian; Waller, David; Rønning, Magnus (Peer reviewed; Journal article, 2023)
      Oxidation of nitric oxide is one of the main steps in the Ostwald process for industrial nitric acid production. This work summarises the use of - supported Ru catalyst to study the oxidation of NO to NO at ambient and 4 ...
    • Reduced well path parameterization for optimization problems through machine learning 

      Kristoffersen, Brage Strand; Bellout, Mathias; Silva, Thiago Lima; Berg, Carl Fredrik (Peer reviewed; Journal article, 2021)
      In this work we apply a recently developed machine learning routine for automatic well planning to simplify well parameterization in reservoir simulation models. This reduced-order parameterization is shown to be beneficial ...
    • Reduction and Dissolution Behaviour of Manganese Slag in the Ferromanganese Process 

      Li, Xiang; Tang, Kai; Tangstad, Merete (Journal article; Peer reviewed, 2020)
      The reduction and liquidus behaviour of manganese slag with different basicities were studied in non-isothermal experiments in the temperature range of 1400–1500 °C. Certain amounts of quartz were added to Assmang ore ...
    • Reduction Kinetics of Pre-Oxidized Ilmenite Pellets by H2-H2O Gas Mixtures 

      Canaguier, Vincent Yves; Ringdalen, Eli (Peer reviewed; Journal article, 2023)
      The reduction behavior of pelletized and pre-oxidized ilmenite is investigated in H2-H2O atmospheres containing between 0 and 7% H2O and at temperatures between 983 and 1183 K (710 and 910 °C). The reduction mechanism ...
    • Reference case and test case for benchmarking of HiPerCap technologies 

      Kvamsdal, Hanne Marie; Haugen, Geir; Brown, Jock; Wolbers, Patrick F.; Drew, Richsrd J.; Khakharia, Purvil; Monteiro, Juliana Garcia Moretz-Sohn; Goetheer, Earl L.V.; Middelkamp, Jan; Kanniche, Mohamed S.; Sirvent, Antoni Julià (Peer reviewed; Journal article, 2017)
      HiPerCap aims to develop high-potential novel and environmentally benign technologies and processes for post-combustion CO2 capture leading to real breakthroughs. The project includes all the main separation categories for ...